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比较标准的做法是对外的服务我们统一提供一个openAPI，这样的调用方需要按照标准提供相应的appID以及密钥来进行验签才能使用。这样固然是比较规范和安全，但复杂度也不亚于开发一个单独的系统了。
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比较标准的做法是对外的服务我们统一提供一个openAPI，这样的调用方需要按照标准提供相应的appID以及密钥来进行验签才能使用。这样固然是比较规范和安全，但复杂度也不亚于开发一个单独的系统了。
这里所讲到的没有那么复杂，就只是把一个不需要各种权限检验的dubbo服务对外">
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        <p><img src="https://ooo.0o0.ooo/2017/05/20/591fd69dab028.jpg" alt="dubbo暴露为http服务.jpg"></p>
<h1 id="前言"><a href="#前言" class="headerlink" title="前言"></a>前言</h1><p>通常来说一个<code>dubbo</code>服务都是对内给内部调用的，但也有可能一个服务就是需要提供给外部使用，并且还不能有使用语言的局限性。</p>
<p>比较标准的做法是对外的服务我们统一提供一个<code>openAPI</code>，这样的调用方需要按照标准提供相应的<code>appID</code>以及密钥来进行验签才能使用。这样固然是比较规范和安全，但复杂度也不亚于开发一个单独的系统了。</p>
<p>这里所讲到的没有那么复杂，就只是把一个不需要各种权限检验的<code>dubbo</code>服务对外提供为<code>HTTP</code>服务。</p>
<p>调用示例:<br><img src="https://ooo.0o0.ooo/2017/05/20/591fd6d022182.jpg" alt="dubbo-http封面.jpg"></p>
<a id="more"></a>
<h1 id="准备工作"><a href="#准备工作" class="headerlink" title="准备工作"></a>准备工作</h1><p>以下是本文所涉及到的一些知识点：</p>
<ul>
<li>Spring相关知识。</li>
<li>Java反射相关知识。</li>
<li>SpringMVC相关知识。</li>
</ul>
<blockquote>
<p>其实思路很简单，就是利用<code>SpringMVC</code>提供一个<code>HTTP</code>接口。<br>在该接口中通过入参进行反射找到具体的<code>dubbo</code>服务实现进行调用。</p>
</blockquote>
<h2 id="HttpProviderConf配置类"><a href="#HttpProviderConf配置类" class="headerlink" title="HttpProviderConf配置类"></a>HttpProviderConf配置类</h2><p>首先需要定义一个<code>HttpProviderConf</code>类用于保存声明需要对外提供服务的包名，毕竟我们反射时需要用到一个类的全限定名：</p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div></pre></td><td class="code"><pre><div class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">HttpProviderConf</span> </span>&#123;</div><div class="line"></div><div class="line">    <span class="comment">/**</span></div><div class="line">     * 提供http访问的包</div><div class="line">     */</div><div class="line">    <span class="keyword">private</span> List&lt;String&gt; usePackage ;</div><div class="line">    <span class="comment">//省略getter setter方法</span></div><div class="line">&#125;</div></pre></td></tr></table></figure>
<p>就只有一个<code>usePackage</code>成员变量，用于存放需要包名。<br>至于用<code>List</code>的原因是允许有多个。</p>
<h2 id="请求响应入参、出参"><a href="#请求响应入参、出参" class="headerlink" title="请求响应入参、出参"></a>请求响应入参、出参</h2><h3 id="HttpRequest入参"><a href="#HttpRequest入参" class="headerlink" title="HttpRequest入参"></a>HttpRequest入参</h3><figure class="highlight java"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div></pre></td><td class="code"><pre><div class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">HttpRequest</span> </span>&#123;</div><div class="line">    <span class="keyword">private</span> String param ;<span class="comment">//入参</span></div><div class="line">    <span class="keyword">private</span> String service ;<span class="comment">//请求service</span></div><div class="line">    <span class="keyword">private</span> String method ;<span class="comment">//请求方法</span></div><div class="line">    <span class="comment">//省略getter setter方法</span></div><div class="line">&#125;</div></pre></td></tr></table></figure>
<p>其中<code>param</code>是用于存放真正调用<code>dubbo</code>服务时的入参，传入<code>json</code>在调用的时候解析成具体的参数对象。</p>
<p><code>service</code>存放<code>dubbo</code>服务声明的<code>interface API</code>的包名。</p>
<p><code>method</code>则是真正调用的方法名称。</p>
<h3 id="HttpResponse-响应"><a href="#HttpResponse-响应" class="headerlink" title="HttpResponse 响应"></a>HttpResponse 响应</h3><figure class="highlight java"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div></pre></td><td class="code"><pre><div class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">HttpResponse</span> <span class="keyword">implements</span> <span class="title">Serializable</span></span>&#123;</div><div class="line"></div><div class="line">    <span class="keyword">private</span> <span class="keyword">static</span> <span class="keyword">final</span> <span class="keyword">long</span> serialVersionUID = -<span class="number">552828440320737814L</span>;</div><div class="line"></div><div class="line">    <span class="keyword">private</span> <span class="keyword">boolean</span> success;<span class="comment">//成功标志</span></div><div class="line"></div><div class="line">    <span class="keyword">private</span> String code;<span class="comment">//信息码</span></div><div class="line"></div><div class="line">    <span class="keyword">private</span> String description;<span class="comment">//描述</span></div><div class="line">    <span class="comment">//省略getter setter方法</span></div><div class="line">&#125;</div></pre></td></tr></table></figure>
<p>这里只是封装了常用的<code>HTTP</code>服务的响应数据。</p>
<h2 id="暴露服务controller"><a href="#暴露服务controller" class="headerlink" title="暴露服务controller"></a>暴露服务controller</h2><p>最重要的则是controller里的实现代码了。</p>
<p>先贴代码：<br><figure class="highlight java"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div><div class="line">20</div><div class="line">21</div><div class="line">22</div><div class="line">23</div><div class="line">24</div><div class="line">25</div><div class="line">26</div><div class="line">27</div><div class="line">28</div><div class="line">29</div><div class="line">30</div><div class="line">31</div><div class="line">32</div><div class="line">33</div><div class="line">34</div><div class="line">35</div><div class="line">36</div><div class="line">37</div><div class="line">38</div><div class="line">39</div><div class="line">40</div><div class="line">41</div><div class="line">42</div><div class="line">43</div><div class="line">44</div><div class="line">45</div><div class="line">46</div><div class="line">47</div><div class="line">48</div><div class="line">49</div><div class="line">50</div><div class="line">51</div><div class="line">52</div><div class="line">53</div><div class="line">54</div><div class="line">55</div><div class="line">56</div><div class="line">57</div><div class="line">58</div><div class="line">59</div><div class="line">60</div><div class="line">61</div><div class="line">62</div><div class="line">63</div><div class="line">64</div><div class="line">65</div><div class="line">66</div><div class="line">67</div><div class="line">68</div><div class="line">69</div><div class="line">70</div><div class="line">71</div><div class="line">72</div><div class="line">73</div><div class="line">74</div><div class="line">75</div><div class="line">76</div><div class="line">77</div><div class="line">78</div><div class="line">79</div><div class="line">80</div><div class="line">81</div><div class="line">82</div><div class="line">83</div><div class="line">84</div><div class="line">85</div><div class="line">86</div><div class="line">87</div><div class="line">88</div><div class="line">89</div><div class="line">90</div><div class="line">91</div><div class="line">92</div><div class="line">93</div><div class="line">94</div><div class="line">95</div><div class="line">96</div><div class="line">97</div><div class="line">98</div><div class="line">99</div><div class="line">100</div><div class="line">101</div><div class="line">102</div><div class="line">103</div><div class="line">104</div><div class="line">105</div><div class="line">106</div><div class="line">107</div><div class="line">108</div><div class="line">109</div><div class="line">110</div><div class="line">111</div><div class="line">112</div><div class="line">113</div><div class="line">114</div><div class="line">115</div><div class="line">116</div><div class="line">117</div><div class="line">118</div><div class="line">119</div><div class="line">120</div><div class="line">121</div><div class="line">122</div><div class="line">123</div><div class="line">124</div><div class="line">125</div><div class="line">126</div><div class="line">127</div><div class="line">128</div><div class="line">129</div><div class="line">130</div><div class="line">131</div><div class="line">132</div><div class="line">133</div><div class="line">134</div><div class="line">135</div><div class="line">136</div><div class="line">137</div><div class="line">138</div><div class="line">139</div><div class="line">140</div><div class="line">141</div><div class="line">142</div><div class="line">143</div><div class="line">144</div><div class="line">145</div><div class="line">146</div><div class="line">147</div><div class="line">148</div><div class="line">149</div><div class="line">150</div><div class="line">151</div><div class="line">152</div><div class="line">153</div><div class="line">154</div><div class="line">155</div></pre></td><td class="code"><pre><div class="line"><span class="meta">@Controller</span></div><div class="line"><span class="meta">@RequestMapping</span>(<span class="string">"/dubboAPI"</span>)</div><div class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">DubboController</span> <span class="keyword">implements</span> <span class="title">ApplicationContextAware</span></span>&#123;</div><div class="line"></div><div class="line">    <span class="keyword">private</span> <span class="keyword">final</span> <span class="keyword">static</span> Logger logger = LoggerFactory.getLogger(DubboController.class);</div><div class="line"></div><div class="line">    <span class="meta">@Autowired</span></div><div class="line">    <span class="keyword">private</span> HttpProviderConf httpProviderConf;</div><div class="line"></div><div class="line">    <span class="comment">//缓存作用的map</span></div><div class="line">    <span class="keyword">private</span> <span class="keyword">final</span> Map&lt;String, Class&lt;?&gt;&gt; cacheMap = <span class="keyword">new</span> HashMap&lt;String, Class&lt;?&gt;&gt;();</div><div class="line"></div><div class="line">    <span class="keyword">protected</span> ApplicationContext applicationContext;</div><div class="line"></div><div class="line"></div><div class="line">    <span class="meta">@ResponseBody</span></div><div class="line">    <span class="meta">@RequestMapping</span>(value = <span class="string">"/&#123;service&#125;/&#123;method&#125;"</span>,method = RequestMethod.POST)</div><div class="line">    <span class="function"><span class="keyword">public</span> String <span class="title">api</span><span class="params">(HttpRequest httpRequest, HttpServletRequest request,</span></span></div><div class="line">                      @PathVariable String service,</div><div class="line">                      @PathVariable String method) &#123;</div><div class="line">        logger.debug(<span class="string">"ip:&#123;&#125;-httpRequest:&#123;&#125;"</span>,getIP(request), JSON.toJSONString(httpRequest));</div><div class="line"></div><div class="line">        String invoke = invoke(httpRequest, service, method);</div><div class="line">        logger.debug(<span class="string">"callback :"</span>+invoke) ;</div><div class="line">        <span class="keyword">return</span> invoke ;</div><div class="line"></div><div class="line">    &#125;</div><div class="line"></div><div class="line"></div><div class="line">    <span class="function"><span class="keyword">private</span> String <span class="title">invoke</span><span class="params">(HttpRequest httpRequest,String service,String method)</span></span>&#123;</div><div class="line">        httpRequest.setService(service);</div><div class="line">        httpRequest.setMethod(method);</div><div class="line"></div><div class="line">        HttpResponse response = <span class="keyword">new</span> HttpResponse() ;</div><div class="line"></div><div class="line">        logger.debug(<span class="string">"input param:"</span>+JSON.toJSONString(httpRequest));</div><div class="line"></div><div class="line">        <span class="keyword">if</span> (!CollectionUtils.isEmpty(httpProviderConf.getUsePackage()))&#123;</div><div class="line">            <span class="keyword">boolean</span> isPac = <span class="keyword">false</span> ;</div><div class="line">            <span class="keyword">for</span> (String pac : httpProviderConf.getUsePackage()) &#123;</div><div class="line">                <span class="keyword">if</span> (service.startsWith(pac))&#123;</div><div class="line">                    isPac = <span class="keyword">true</span> ;</div><div class="line">                    <span class="keyword">break</span> ;</div><div class="line">                &#125;</div><div class="line">            &#125;</div><div class="line">            <span class="keyword">if</span> (!isPac)&#123;</div><div class="line">                <span class="comment">//调用的是未经配置的包</span></div><div class="line">                logger.error(<span class="string">"service is not correct,service="</span>+service);</div><div class="line">                response.setCode(<span class="string">"2"</span>);</div><div class="line">                response.setSuccess(<span class="keyword">false</span>);</div><div class="line">                response.setDescription(<span class="string">"service is not correct,service="</span>+service);</div><div class="line">            &#125;</div><div class="line"></div><div class="line">        &#125;</div><div class="line">        <span class="keyword">try</span> &#123;</div><div class="line">            Class&lt;?&gt; serviceCla = cacheMap.get(service);</div><div class="line">            <span class="keyword">if</span> (serviceCla == <span class="keyword">null</span>)&#123;</div><div class="line">                serviceCla = Class.forName(service) ;</div><div class="line">                logger.debug(<span class="string">"serviceCla:"</span>+JSON.toJSONString(serviceCla));</div><div class="line"></div><div class="line">                <span class="comment">//设置缓存</span></div><div class="line">                cacheMap.put(service,serviceCla) ;</div><div class="line">            &#125;</div><div class="line">            Method[] methods = serviceCla.getMethods();</div><div class="line">            Method targetMethod = <span class="keyword">null</span> ;</div><div class="line">            <span class="keyword">for</span> (Method m : methods) &#123;</div><div class="line">                <span class="keyword">if</span> (m.getName().equals(method))&#123;</div><div class="line">                    targetMethod = m ;</div><div class="line">                    <span class="keyword">break</span> ;</div><div class="line">                &#125;</div><div class="line">            &#125;</div><div class="line"></div><div class="line">            <span class="keyword">if</span> (method == <span class="keyword">null</span>)&#123;</div><div class="line">                logger.error(<span class="string">"method is not correct,method="</span>+method);</div><div class="line">                response.setCode(<span class="string">"2"</span>);</div><div class="line">                response.setSuccess(<span class="keyword">false</span>);</div><div class="line">                response.setDescription(<span class="string">"method is not correct,method="</span>+method);</div><div class="line">            &#125;</div><div class="line"></div><div class="line">            Object bean = <span class="keyword">this</span>.applicationContext.getBean(serviceCla);</div><div class="line">            Object result = <span class="keyword">null</span> ;</div><div class="line">            Class&lt;?&gt;[] parameterTypes = targetMethod.getParameterTypes();</div><div class="line">            <span class="keyword">if</span> (parameterTypes.length == <span class="number">0</span>)&#123;</div><div class="line">                <span class="comment">//没有参数</span></div><div class="line">                result = targetMethod.invoke(bean);</div><div class="line">            &#125;<span class="keyword">else</span> <span class="keyword">if</span> (parameterTypes.length == <span class="number">1</span>)&#123;</div><div class="line">                Object json = JSON.parseObject(httpRequest.getParam(), parameterTypes[<span class="number">0</span>]);</div><div class="line">                result = targetMethod.invoke(bean,json) ;</div><div class="line">            &#125;<span class="keyword">else</span> &#123;</div><div class="line">                logger.error(<span class="string">"Can only have one parameter"</span>);</div><div class="line">                response.setSuccess(<span class="keyword">false</span>);</div><div class="line">                response.setCode(<span class="string">"2"</span>);</div><div class="line">                response.setDescription(<span class="string">"Can only have one parameter"</span>);</div><div class="line">            &#125;</div><div class="line">            <span class="keyword">return</span> JSON.toJSONString(result) ;</div><div class="line"></div><div class="line">        &#125;<span class="keyword">catch</span> (ClassNotFoundException e)&#123;</div><div class="line">            logger.error(<span class="string">"class not found"</span>,e);</div><div class="line">            response.setSuccess(<span class="keyword">false</span>);</div><div class="line">            response.setCode(<span class="string">"2"</span>);</div><div class="line">            response.setDescription(<span class="string">"class not found"</span>);</div><div class="line">        &#125; <span class="keyword">catch</span> (InvocationTargetException e) &#123;</div><div class="line">            logger.error(<span class="string">"InvocationTargetException"</span>,e);</div><div class="line">            response.setSuccess(<span class="keyword">false</span>);</div><div class="line">            response.setCode(<span class="string">"2"</span>);</div><div class="line">            response.setDescription(<span class="string">"InvocationTargetException"</span>);</div><div class="line">        &#125; <span class="keyword">catch</span> (IllegalAccessException e) &#123;</div><div class="line">            logger.error(<span class="string">"IllegalAccessException"</span>,e);</div><div class="line">            response.setSuccess(<span class="keyword">false</span>);</div><div class="line">            response.setCode(<span class="string">"2"</span>);</div><div class="line">            response.setDescription(<span class="string">"IllegalAccessException"</span>);</div><div class="line">        &#125;</div><div class="line">        <span class="keyword">return</span> JSON.toJSONString(response) ;</div><div class="line">    &#125;</div><div class="line"></div><div class="line">    <span class="comment">/**</span></div><div class="line">     * 获取IP</div><div class="line">     * <span class="doctag">@param</span> request</div><div class="line">     * <span class="doctag">@return</span></div><div class="line">     */</div><div class="line">    <span class="function"><span class="keyword">private</span> String <span class="title">getIP</span><span class="params">(HttpServletRequest request)</span> </span>&#123;</div><div class="line">        <span class="keyword">if</span> (request == <span class="keyword">null</span>)</div><div class="line">            <span class="keyword">return</span> <span class="keyword">null</span>;</div><div class="line">        String s = request.getHeader(<span class="string">"X-Forwarded-For"</span>);</div><div class="line">        <span class="keyword">if</span> (s == <span class="keyword">null</span> || s.length() == <span class="number">0</span> || <span class="string">"unknown"</span>.equalsIgnoreCase(s)) &#123;</div><div class="line"></div><div class="line">            s = request.getHeader(<span class="string">"Proxy-Client-IP"</span>);</div><div class="line">        &#125;</div><div class="line">        <span class="keyword">if</span> (s == <span class="keyword">null</span> || s.length() == <span class="number">0</span> || <span class="string">"unknown"</span>.equalsIgnoreCase(s)) &#123;</div><div class="line"></div><div class="line">            s = request.getHeader(<span class="string">"WL-Proxy-Client-IP"</span>);</div><div class="line">        &#125;</div><div class="line">        <span class="keyword">if</span> (s == <span class="keyword">null</span> || s.length() == <span class="number">0</span> || <span class="string">"unknown"</span>.equalsIgnoreCase(s)) &#123;</div><div class="line">            s = request.getHeader(<span class="string">"HTTP_CLIENT_IP"</span>);</div><div class="line">        &#125;</div><div class="line">        <span class="keyword">if</span> (s == <span class="keyword">null</span> || s.length() == <span class="number">0</span> || <span class="string">"unknown"</span>.equalsIgnoreCase(s)) &#123;</div><div class="line"></div><div class="line">            s = request.getHeader(<span class="string">"HTTP_X_FORWARDED_FOR"</span>);</div><div class="line">        &#125;</div><div class="line">        <span class="keyword">if</span> (s == <span class="keyword">null</span> || s.length() == <span class="number">0</span> || <span class="string">"unknown"</span>.equalsIgnoreCase(s)) &#123;</div><div class="line"></div><div class="line">            s = request.getRemoteAddr();</div><div class="line">        &#125;</div><div class="line">        <span class="keyword">if</span> (<span class="string">"127.0.0.1"</span>.equals(s) || <span class="string">"0:0:0:0:0:0:0:1"</span>.equals(s))</div><div class="line">            <span class="keyword">try</span> &#123;</div><div class="line">                s = InetAddress.getLocalHost().getHostAddress();</div><div class="line">            &#125; <span class="keyword">catch</span> (UnknownHostException unknownhostexception) &#123;</div><div class="line">                <span class="keyword">return</span> <span class="string">""</span>;</div><div class="line">            &#125;</div><div class="line">        <span class="keyword">return</span> s;</div><div class="line">    &#125;</div><div class="line"></div><div class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">setApplicationContext</span><span class="params">(ApplicationContext applicationContext)</span> <span class="keyword">throws</span> BeansException </span>&#123;</div><div class="line">        <span class="keyword">this</span>.applicationContext = applicationContext;</div><div class="line">    &#125;</div></pre></td></tr></table></figure></p>
<p>先一步一步的看：</p>
<ul>
<li><p>首先是定义了一个<code>DubboController</code>,并使用了<code>SpringMVC</code>的注解对外暴露<code>HTTP</code>服务。</p>
</li>
<li><p>实现了<code>org.springframework.context.ApplicationContextAware</code>类，<br>实现了<code>setApplicationContext()</code>方法用于初始化<code>Spring</code>上下文对象，在之后可以获取到容器里的相应对象。</p>
</li>
<li><p>核心的<code>invoke()</code>方法。</p>
</li>
<li>调用时：<code>http://127.0.0.1:8080/SSM-SERVICE/dubboAPI/com.crossoverJie.api.UserInfoApi/getUserInfo</code>。</li>
<li>具体如上文的调用实例。先将<code>com.crossoverJie.api.UserInfoApi</code>、<code>getUserInfo</code>赋值到<code>httpRequest</code>入参中。</li>
<li>判断传入的包是否是对外提供的。如下配置：<figure class="highlight xml"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div></pre></td><td class="code"><pre><div class="line"><span class="comment">&lt;!--dubbo服务暴露为http服务--&gt;</span></div><div class="line"><span class="tag">&lt;<span class="name">bean</span> <span class="attr">class</span>=<span class="string">"com.crossoverJie.dubbo.http.conf.HttpProviderConf"</span>&gt;</span></div><div class="line">    <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"usePackage"</span>&gt;</span></div><div class="line">        <span class="tag">&lt;<span class="name">list</span>&gt;</span></div><div class="line">        	   <span class="comment">&lt;!--需要暴露服务的接口包名，可多个--&gt;</span></div><div class="line">            <span class="tag">&lt;<span class="name">value</span>&gt;</span>com.crossoverJie.api<span class="tag">&lt;/<span class="name">value</span>&gt;</span></div><div class="line">        <span class="tag">&lt;/<span class="name">list</span>&gt;</span></div><div class="line">    <span class="tag">&lt;/<span class="name">property</span>&gt;</span></div><div class="line"><span class="tag">&lt;/<span class="name">bean</span>&gt;</span></div><div class="line"><span class="comment">&lt;!--扫描暴露包--&gt;</span></div><div class="line"><span class="tag">&lt;<span class="name">context:component-scan</span> <span class="attr">base-package</span>=<span class="string">"com.crossoverJie.dubbo.http"</span>/&gt;</span></div></pre></td></tr></table></figure>
</li>
</ul>
<p>其中的<code>com.crossoverJie.api</code>就是自己需要暴露的包名，可以多个。</p>
<ul>
<li>接着在缓存<code>map</code>中取出反射获取到的接口类类型，如果获取不到则通过反射获取，并将值设置到缓存<code>map</code>中，这样不用每次都反射获取，可以节省系统开销(<code>反射很耗系统资源</code>)。</li>
<li>接着也是判断该接口中是否有传入的<code>getUserInfo</code>方法。</li>
<li>取出该方法的参数列表，如果没有参数则直接调用。</li>
<li>如果有参数，判断个数。这里最多只运行一个参数。也就是说在真正的<code>dubbo</code>调用的时候只能传递一个<code>BO</code>类型，具体的参数列表可以写到<code>BO</code>中。因为如果有多个在进行<code>json</code>解析的时候是无法赋值到两个参数对象中去的。</li>
<li>之后进行调用，将调用返回的数据进行返回即可。</li>
</ul>
<h1 id="总结"><a href="#总结" class="headerlink" title="总结"></a>总结</h1><p>通常来说这样提供的<code>HTTP</code>接口再实际中用的不多，但是很方便调试。</p>
<p>比如写了一个<code>dubbo</code>的查询接口，在测试环境或者是预发布环境中就可以直接通过<code>HTTP</code>请求的方式进行简单的测试，或者就是查询数据。比在<code>Java</code>中写单测来测试或查询快的很多。</p>
<h2 id="安装"><a href="#安装" class="headerlink" title="安装"></a>安装</h2><figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">git clone https://github.com/crossoverJie/SSM-DUBBO-HTTP.git</div></pre></td></tr></table></figure>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">cd SSM-DUBBO-HTTP</div></pre></td></tr></table></figure>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">mvn clean</div></pre></td></tr></table></figure>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">mvn install</div></pre></td></tr></table></figure>
<h2 id="使用"><a href="#使用" class="headerlink" title="使用"></a>使用</h2><figure class="highlight xml"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div></pre></td><td class="code"><pre><div class="line"><span class="tag">&lt;<span class="name">dependency</span>&gt;</span></div><div class="line">    <span class="tag">&lt;<span class="name">groupId</span>&gt;</span>com.crossoverJie<span class="tag">&lt;/<span class="name">groupId</span>&gt;</span></div><div class="line">    <span class="tag">&lt;<span class="name">artifactId</span>&gt;</span>SSM-HTTP-PROVIDER<span class="tag">&lt;/<span class="name">artifactId</span>&gt;</span></div><div class="line">    <span class="tag">&lt;<span class="name">version</span>&gt;</span>1.0.0<span class="tag">&lt;/<span class="name">version</span>&gt;</span></div><div class="line"><span class="tag">&lt;/<span class="name">dependency</span>&gt;</span></div></pre></td></tr></table></figure>
<h2 id="spring配置"><a href="#spring配置" class="headerlink" title="spring配置"></a>spring配置</h2><figure class="highlight xml"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div></pre></td><td class="code"><pre><div class="line"><span class="comment">&lt;!--dubbo服务暴露为http服务--&gt;</span></div><div class="line"><span class="tag">&lt;<span class="name">bean</span> <span class="attr">class</span>=<span class="string">"com.crossoverJie.dubbo.http.conf.HttpProviderConf"</span>&gt;</span></div><div class="line">    <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"usePackage"</span>&gt;</span></div><div class="line">        <span class="tag">&lt;<span class="name">list</span>&gt;</span></div><div class="line">        	   <span class="comment">&lt;!--需要暴露服务的接口包名，可多个--&gt;</span></div><div class="line">            <span class="tag">&lt;<span class="name">value</span>&gt;</span>com.crossoverJie.api<span class="tag">&lt;/<span class="name">value</span>&gt;</span></div><div class="line">        <span class="tag">&lt;/<span class="name">list</span>&gt;</span></div><div class="line">    <span class="tag">&lt;/<span class="name">property</span>&gt;</span></div><div class="line"><span class="tag">&lt;/<span class="name">bean</span>&gt;</span></div><div class="line"><span class="comment">&lt;!--扫描暴露包--&gt;</span></div><div class="line"><span class="tag">&lt;<span class="name">context:component-scan</span> <span class="attr">base-package</span>=<span class="string">"com.crossoverJie.dubbo.http"</span>/&gt;</span></div></pre></td></tr></table></figure>
<blockquote>
<p> 插件地址：<a href="https://github.com/crossoverJie/SSM-DUBBO-HTTP" target="_blank" rel="external">https://github.com/crossoverJie/SSM-DUBBO-HTTP</a></p>
<p>项目地址：<a href="https://github.com/crossoverJie/SSM.git" target="_blank" rel="external">https://github.com/crossoverJie/SSM.git</a></p>
<p>个人博客地址：<a href="http://crossoverjie.top">http://crossoverjie.top</a>。</p>
<p>GitHub地址：<a href="https://github.com/crossoverJie" target="_blank" rel="external">https://github.com/crossoverJie</a>。</p>
</blockquote>

      
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